body{
    overflow: hidden;
    background-color: #000;
}
.box{
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 5px solid black;
    box-shadow: 0 0 3px 3px purple;
    transform: translate(-50%,-50%);
    background: url('./img/R-C.png') no-repeat center/cover;
}